20405775

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{20929}}^1$

素因数の和:20955

約数の個数: 24

約数和(自身を含む): 36334480

約数和(自身を除く): 15928705

約数列:

[1, 3, 5, 13, 15, 25, 39, 65, 75, 195, 325, 975, 20929, 62787, 104645, 272077, 313935, 523225, 816231, 1360385, 1569675, 4081155, 6801925, 20405775]

約数ペア:

[(1, 20405775), (3, 6801925), (5, 4081155), (13, 1569675), (15, 1360385), (25, 816231), (39, 523225), (65, 313935), (75, 272077), (195, 104645), (325, 62787), (975, 20929)]